NtUserScrollDC.c

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/*
 * PROJECT:         ReactOS api tests
 * LICENSE:         GPL - See COPYING in the top level directory
 * PURPOSE:         Test for NtUserScrollDC
 * PROGRAMMERS:
 */
 
#include "../win32nt.h"
 
START_TEST(NtUserScrollDC)
{
    HINSTANCE hinst = GetModuleHandle(NULL);
    HWND hWnd;
    HDC hDC;
    HRGN hRgn, hTmpRgn;
    RECT rcScroll, rcClip, rcUpdate;
    RECT rect = {0,0,100,100};
    INT Result;
 
    hWnd = CreateWindowA("BUTTON",
                         "Test",
                         BS_PUSHBUTTON | WS_VISIBLE,
                         0,
                         0,
                         50,
                         100,
                         NULL,
                         NULL,
                         hinst,
                         0);
    ASSERT(hWnd);
    RedrawWindow(hWnd, &rect, NULL, RDW_UPDATENOW);
 
    hDC = GetDC(hWnd);
    ASSERT(hDC);
 
    hRgn = CreateRectRgn(0,0,10,10);
 
 
    /* Test inverted clip rect */
    rcScroll.left = 0;
    rcScroll.top = 25;
    rcScroll.right = 100;
    rcScroll.bottom = 40;
    rcClip.left = 0;
    rcClip.top = 35;
    rcClip.right = -70;
    rcClip.bottom = -1000;
    SetLastError(ERROR_SUCCESS);
    Result = NtUserScrollDC(hDC, 10, 20, &rcScroll, &rcClip, hRgn, &rcUpdate);
    RTEST(Result == 1);
    RTEST(GetLastError() == ERROR_SUCCESS);
 
    /* Test inverted scroll rect */
    rcScroll.left = 0;
    rcScroll.top = 25;
    rcScroll.right = -100;
    rcScroll.bottom = -40;
    rcClip.left = 0;
    rcClip.top = 35;
    rcClip.right = 70;
    rcClip.bottom = 1000;
    SetLastError(ERROR_SUCCESS);
    Result = NtUserScrollDC(hDC, 10, 20, &rcScroll, &rcClip, hRgn, &rcUpdate);
    RTEST(Result == 1);
    RTEST(GetLastError() == ERROR_SUCCESS);
 
    rcScroll.left = 0;
    rcScroll.top = 25;
    rcScroll.right = 100;
    rcScroll.bottom = 40;
 
    /* Test invalid update region */
    SetLastError(ERROR_SUCCESS);
    Result = NtUserScrollDC(hDC, 10, 20, &rcScroll, &rcClip, (HRGN)0x123456, &rcUpdate);
    RTEST(Result == 0);
    TEST(GetLastError() == ERROR_INVALID_HANDLE);
 
    /* Test invalid dc */
    SetLastError(ERROR_SUCCESS);
    Result = NtUserScrollDC((HDC)0x123456, 10, 20, &rcScroll, &rcClip, hRgn, &rcUpdate);
    RTEST(Result == 0);
    RTEST(GetLastError() == ERROR_SUCCESS);
 
    /* Test invalid update rect */
    SetLastError(ERROR_SUCCESS);
    Result = NtUserScrollDC(hDC, 10, 20, &rcScroll, &rcClip, hRgn, (PVOID)(LONG_PTR)0x80001000);
    RTEST(Result == 0);
    RTEST(GetLastError() == ERROR_NOACCESS);
 
    Result = NtUserScrollDC(hDC, 10, 20, &rcScroll, &rcClip, hRgn, &rcUpdate);
 
    RTEST(Result == TRUE);
    RTEST(rcUpdate.left == 0);
    RTEST(rcUpdate.top == 35);
    RTEST(rcUpdate.right == 70);
    RTEST(rcUpdate.bottom == 55);
 
    hTmpRgn = CreateRectRgn(10,45,70,55);
    Result = CombineRgn(hRgn, hRgn, hTmpRgn, RGN_XOR);
    RTEST(Result == SIMPLEREGION);
 
    SetRectRgn(hTmpRgn,0,35,70,40);
    Result = CombineRgn(hRgn, hRgn, hTmpRgn, RGN_XOR);
    RTEST(Result == NULLREGION);
 
    DeleteObject(hTmpRgn);
 
    /* TODO: Test with another window in front */
    /* TODO: Test with different viewport extension */
 
    ReleaseDC(hWnd, hDC);
    DestroyWindow(hWnd);
    DeleteObject(hRgn);
 
}